344 Frerp Museum or Naturat History — OrnitHovoey, Vot. I. 
cream color with only a faint trace of ashy on sides of the breast; outer 
wing coverts broadly edged with white; white end of third outer tail 
feather more extensive. 
Wing, 52; tail, 53; bill, ro mm. 
Cistothorus platensis tamze subsp. nov. 
Type from Paramo de Tama (head waters of the Tachira River), 
Venezuela. Adult male, No. 44860, Field Museum of Natural History. 
Collected by W. H. Osgood and 8. G. Jewett, March 1, 1911. 
General coloration more rufous brown than either C. p. equatorialis, 
merid@, or apolinari, and decidedly smaller than the last; crown brown 
with only a slight tinge of rufous and obscurely streaked with dusky. 
Coloration of upper parts approaching equatorialis, but pale streaks on 
the back more buffy; under parts much darker rufous brown, with only 
a slight indication of whitish on the middle of belly and throat; rump 
plain. 
Wing, 48; tail, 47; bill, 12 mm. 
Five males and one female examined from the type locality. 
Troglodytes musculus beckeri subsp. nov. 
Type from Serra Baturité, Ceara, Brazil. Adult male, No. 49115, 
Field Museum of Natural History. Collected by R. H. Becker, July 
14, 1913. 
Similar to T. m. musculus, but differs in having the under parts paler 
and more buffy rufous; under tail coverts clear ochraceous rufous with- 
out spots or bars; crown and back paler and more grayish than in mus- 
culus and the upper tail coverts brighter rufous. From T. m. clarus it 
may be at once distinguished by its brighter rufous upper tail coverts 
and more rufous and unmarked under tail coverts, more grayish tinged 
back and the pronounced rufous buff coloration of the sides of the body. 
Wing, 52; tail, 43; bill, 13 mm. 
Planesticus rufiventer juensis subsp. nov. 
Type from Jua, near Iguatu, Ceard, Brazil. Adult male, No. 49114, 
Field Museum of Natural History. Collected by R. H. Becker, August 
I, 1913. 
Similar to P. r. rufiventer from Minas Geraes and Rio de Janeiro, but 
differs in having the upper parts decidedly more grayish olive and the 
belly and flanks paler and more ochraceous rufous. 
Wing, 124; tail, 114; bill, 20; tarsus, 33 mm. 
Eight specimens examined from the type locality. 
